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Design and evaluation of a magnetorheological damper based prosthetic knee
Published in Materials and Energy Research Center
2019
Volume: 32
   
Issue: 1
Pages: 146 - 152
Abstract
In this work, a magnetorheological (MR) damper based above-knee prosthesis is design and evaluated based on its performance in swing phase and in stance phase. Initially, a dynamic system model for swing phase of a prosthetic leg incorporating a single-axis knee with ideal MR damper was built. The dynamic properties of the damper are represented with Bingham parametric model. From Bingham model, governing damper parameters that determine the damping force and piston displacement of the damper are identified and optimized so as to enable the single-axis knee to nearly mimick the natural swing phase trajectory of a healthy person for level-ground walking as obtained from experimental data. Then, with the optimal damper parameters, an MR damper valve constrained in a desired cylindrical volume is developed. Finally, the prosthetic knee with the MR damper is evaluated for its performance during stance phase, based on ISO standard loading condition for the intended application. The results show that, compare to Rheo knee ® , the MR damper based prosthetic knee has achieved up to 68% reduction by volume and 40% reduction by weight. © 2019 Materials and Energy Research Center. All Rights Reserved.
About the journal
JournalInternational Journal of Engineering, Transactions A: Basics
PublisherMaterials and Energy Research Center
ISSN17281431
Open AccessNo
Concepts (13)
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    Implants (surgical)
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    Iso standards
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    KNEE PROSTHESES
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    PISTON DISPLACEMENT
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    Above-knee prosthesis
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    Damping forces
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    Design and evaluations
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    Dynamic system modeling
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    Knee
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    Magneto-rheological dampers
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    Parametric modeling
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    SWING PHASE
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    Damping